You could use the structure style you have with the "Cylindrical Structure Slab Top Circular Frame" structure. Yes the frame is circular, but it would look the same as a square frame in a profile. The view from the top would be handled by the structure style using a block for that view direction. This structure would have all relative parameters available too. (structure dia., wall, floor and slab thickness, frame height, etc)
If you were to use a block for the profile view it would be a little different than the plan view. The plan view inserts at the center of the structure. In profile view it inserts at the top of the structure. The profile view also needs to be able to stretch the block as needed to accommodate various structure depths depending on the attached pipes. For this you need to make sure the block has its setting for "Scale uniformly" set to No. (in the properties window within the block editor with no objects selected). Note, its going to stretch the entire block. It won't hold the geometry of the top and only stretch the bottom. This is why I thought using a similar round structure above was a better solution.
Mark Mccall
CAD Mangler

VHB - Engineering, Inc.